Display apparatus and method for remotely outputting audio

PRIORITY

This application claims priority under 35 U.S.C. §119(a) to Korean Patent Application No. 2009-0109500, filed in the Korean Intellectual Property Office on Nov. 13, 2009 and Korean Patent Application No. 2010-0105358, filed in the Korean Intellectual Property Office on Oct. 27, 2010, the disclosure of which is incorporated herein by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates generally to a display apparatus and method for remotely outputting audio, and more particularly, to a display apparatus which allows audio which is supposed to be output in a digital apparatus to be output in another remotely located digital apparatus, a method for remotely outputting audio thereof, a mobile apparatus, and a method for outputting audio thereof.

2. Description of the Related Art

Recently, as various digital apparatuses are introduced, the number of digital apparatus possessed by a user has increased. Therefore, it is no exaggeration to say that the user is literally surrounded by numerous digital apparatuses.

Those digital apparatuses have contributed to making the user's life more enriched and convenient. These days, as a digital apparatus becomes more sophisticated and multi-functional in a relatively short period of time, its contribution to the user's life has greatly increased.

However, the user only focuses on making a digital apparatus more sophisticated and multi-functional in his or her pursuit to realizing more convenient and enriched way of life.

Yet, there is a limit to the function performed by a single digital apparatus. Therefore, a method for making the user's life more convenient and enriched by converging the digital apparatuses owned by the user to create new function which cannot be performed by a single digital apparatus is required.

SUMMARY OF THE INVENTION

The present invention has been made to address at least the above problems and/or disadvantages and to provide at least the advantages described below.

Accordingly, an aspect of the present invention is to provide a display apparatus which allows audio which is supposed to be output in a certain digital apparatus to be output in another remotely located digital apparatus, a method for remotely outputting audio thereof, a mobile apparatus, and a method for outputting audio thereof.

In accordance with an aspect of the present invention, a method for remotely outputting audio in a display apparatus includes outputting Audio/Video (AV) data, if a command to remotely output audio is input while the AV data is being output, stopping outputting audio of the AV data while outputting video of the AV data, and transmitting at least one of compressed audio data separated from the AV data and information regarding a time when transmission of the compressed audio data starts to an external apparatus.

A method for outputting audio in a mobile apparatus, according to an exemplary embodiment, includes receiving compressed audio data from an external apparatus, decompressing received compressed audio data by decoding the audio data, and outputting decompressed audio data.

A display apparatus, according to an exemplary embodiment, includes a communication unit which communicates with an external apparatus, an output unit which outputs AV data, a switching unit which, if a command to remotely output audio is input while the AV data is output, stops outputting audio of the AV data while keeps outputting video of the AV data, and a controller which controls the switching unit to transmit at least one of compressed audio data separated from the AV data and information regarding a time when transmission of the compressed audio data starts to an external apparatus through the communication unit.

According to another aspect of the present invention a mobile apparatus includes a network communication unit which receives one of compressed audio data and information regarding a time when transmission of the compressed audio data starts, a controller which decompresses received compressed audio data by decoding the audio data, and an output unit which outputs decompressed audio data.

Audio which is supposed to be output in a certain digital apparatus may be output in another remotely located digital apparatus. Accordingly, a user may be provided with video and audio from different digital apparatuses separately.

In addition, according to an embodiment, content irrelevant to audio may be provided through a display while audio which is supposed to be output in another digital apparatus is being output. Accordingly, a user may be provided with various content through a single digital apparatus simultaneously and enjoy them.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and/or other aspects of the present disclosure will be more apparent by describing the present disclosure with reference to the accompanying drawings, in which:

<figref idref="DRAWINGS">FIG. 1</figref> is a diagram illustrating a method for remotely outputting audio according to an embodiment;

<figref idref="DRAWINGS">FIG. 2</figref> is a diagram illustrating a method for remotely outputting audio and caption according to another embodiment;

<figref idref="DRAWINGS">FIG. 3</figref> is a diagram illustrating a method for remotely outputting multiple audio according to another embodiment;

<figref idref="DRAWINGS">FIG. 4</figref> is a diagram illustrating a method for remotely outputting multiple audio and caption according to another embodiment;

<figref idref="DRAWINGS">FIG. 5</figref> is a detailed block diagram of a DTV constituting an audio remote output system;

<figref idref="DRAWINGS">FIG. 6</figref> is a detailed block diagram of a mobile phone constituting an audio remote output system; and

<figref idref="DRAWINGS">FIGS. 7A and 7B</figref> are diagrams illustrating an example of a Graphical User Interface (GUI) for selecting a digital apparatus through which audio is output.

DETAILED DESCRIPTION OF EMBODIMENTS OF THE PRESENT INVENTION

Various embodiments of the present invention are described in detail below with reference to the accompanying drawings.

In the description, like drawing reference numerals are used for the like elements, even in different drawings. The matters defined in the description, such as detailed construction and elements, are provided to assist in a comprehensive understanding of embodiments. However, embodiments can be practiced without those specifically defined matters. Also, well-known functions or constructions that are commonly known are not described in detail since they would obscure the application with unnecessary detail.

For better description and understanding, AV content is defined as content including both video data and audio data or content including not only video data and audio data but also caption data, video content is defined as content including only video data, and audio content is defined as content including only audio data. In addition, AV content may be AV data, audio data may be an audio signal, and video data may be a video signal.

The operation of remotely outputting audio is performed by an audio remote output system which is consisted of a DTV <b>100</b> and a mobile phone <b>200</b>. In an audio remote output system, the DTV <b>100</b> serves as an apparatus which separates/transmits audio from AV content, and the mobile phone serves as an apparatus which receives/output the separated/transmitted audio.

Hereinafter, the process of remotely outputting audio in an audio remote output system which is consisted of the DTV <b>100</b> and the mobile phone <b>200</b> will be explained with reference to <figref idref="DRAWINGS">FIG. 1</figref>.

<figref idref="DRAWINGS">FIG. 1</figref> is a diagram illustrating a method for remotely outputting audio according to an embodiment. In <figref idref="DRAWINGS">FIG. 1</figref>, the operations performed by the DTV <b>100</b> are illustrated in the left side and the operations performed by the mobile phone <b>200</b> are illustrated in the right side.

As illustrated in <figref idref="DRAWINGS">FIG. 1</figref>, if a command to remotely output audio is input from a user in step S<b>320</b> while broadcast content is being received and output in step S<b>310</b>, the DTV <b>100</b> sets communication connection with the mobile phone <b>200</b> in step S<b>330</b>. Since the broadcast content include both video data and audio data, the broadcast content may be regarded as AV data.

Subsequently, the DTV <b>100</b> stops outputting audio, but keeps outputting video of the broadcast content in step S<b>340</b>. Accordingly, a broadcast image is output but broadcast audio is not output in the DTV <b>100</b>.

The DTV <b>100</b> transmits audio data separated from received broadcast content to the mobile phone <b>200</b> in step S<b>350</b>. In this case, the audio data transmitted to the mobile phone <b>200</b> from the DTV <b>100</b> is data which is separated from the broadcast content but is not decoded. Therefore, the audio data transmitted in step S<b>350</b> is compressed audio data.

Meanwhile, the mobile phone <b>200</b> receives audio data which is transmitted from the DTV <b>100</b> in step S<b>350</b>, decodes (decompresses) the received audio data, and outputs the decoded audio data in step S<b>360</b>. The mobile phone <b>200</b> may output content which are irrelevant to the audio data output in step S<b>360</b> through a display while the audio is being output in step S<b>360</b> in step S<b>370</b>.

The content output in step S<b>370</b> are content which are not audio content and may be AV content, video content or text content.

When AV content is output in step S<b>370</b>, it is desirable to output only video without audio so as not to interfere with the audio of broadcast content which is output in step S<b>360</b>.

The content output in step S<b>370</b> may be one of video content, text content, and video content separated from AV content. Herein, video content and video content separated from AV content may be video content corresponding to audio data. For example, the content may be content stored in the mobile phone <b>200</b> or content received from other external apparatuses. Herein, the external apparatuses include the DTV <b>100</b>.

For example, it is possible to receive the video of broadcast content which is provided by other channel (for example, a second channel) than a channel (for example, a first channel) providing broadcast content in step S<b>310</b> from the DTV <b>100</b> and output the video. In this case, however, the DTV <b>100</b> should have two tuners.

The video data of broadcast content which is provided by other channel and received from the DTV <b>100</b> is video data which is not decoded after being separated from the broadcast content. Therefore, in order to output the video data through a display, the video data should be decoded (decompressed) before being output.

Hereinafter, the process of remotely outputting audio and caption data in an audio remote output system which is consisted of the DTV <b>100</b> and the mobile phone will be explained in detail with reference to <figref idref="DRAWINGS">FIG. 2</figref>. Herein, the caption refers to texts describing content of audio data and may be obtained from AV data.

<figref idref="DRAWINGS">FIG. 2</figref> is a diagram illustrating a method for remotely outputting audio and caption according to another embodiment. Just like in <figref idref="DRAWINGS">FIG. 1</figref>, the operations performed by the DTV <b>100</b> are illustrated in the left side and the operations performed by the mobile phone <b>200</b> are illustrated in the right side in <figref idref="DRAWINGS">FIG. 2</figref>.

As illustrated in <figref idref="DRAWINGS">FIG. 2</figref>, if a command to remotely output audio and caption data is input from a user in step S<b>420</b> while broadcast content is being received and output in step S<b>410</b>, the DTV <b>100</b> sets communication connection with the mobile phone <b>200</b> in step S<b>430</b>.

Subsequently, the DTV <b>100</b> stops outputting audio, but keeps outputting video of the broadcast content in step S<b>440</b>. Accordingly, a broadcast image is output but broadcast audio is not output in the DTV <b>100</b>. Meanwhile, the DTV <b>100</b> may or may not output caption data of broadcast content depending on a user's setting.

The DTV <b>100</b> transmits audio data and caption data separated from the broadcast content to the mobile phone <b>200</b> in step S<b>450</b>. In this case, the audio data transmitted to the mobile phone <b>200</b> from the DTV <b>100</b> is data which is not decoded after being separated from the broadcast content. Therefore, the audio data transmitted in step S<b>450</b> is compressed audio data.

The mobile phone <b>200</b> receives audio data transmitted from the DTV <b>100</b> in step S<b>450</b>, decodes (decompresses) the received audio data, and outputs the decoded audio data in step S<b>460</b>. In addition, the mobile phone <b>200</b> outputs caption data transmitted from the DTV <b>100</b> in step <b>450</b> through a display in step S<b>470</b>.

Thereafter, when a command to execute an electronic dictionary is input from a user in step S<b>480</b>, the mobile phone <b>200</b> executes electronic dictionary function in step S<b>490</b>. Accordingly, the user may look up the meaning of words in the caption output through a display in step S<b>470</b> using the electronic dictionary provided in step S<b>490</b>.

Hereinafter, the process of remotely outputting multiple audio in a multiple audio remote output system which is consisted of the DTV <b>100</b> and the mobile phone <b>200</b> will be explained in detail with reference to <figref idref="DRAWINGS">FIG. 3</figref>.

<figref idref="DRAWINGS">FIG. 3</figref> is a diagram illustrating a method for remotely outputting multiple audio according to another embodiment. Just like in <figref idref="DRAWINGS">FIGS. 1 and 2</figref>, the operations performed by the DTV <b>100</b> are illustrated in the left side and the operations performed by the mobile phone <b>200</b> are illustrated in the right side in <figref idref="DRAWINGS">FIG. 3</figref>.

As illustrated in <figref idref="DRAWINGS">FIG. 3</figref>, if a command to remotely output ‘an original language’ audio is input from a user in step S<b>520</b> while bilingual broadcast content is being received and output in step S<b>510</b>, the DTV <b>100</b> sets communication connection with the mobile phone <b>200</b> in step S<b>530</b>.

Subsequently, the DTV <b>100</b> outputs video and ‘a native language’ audio of the broadcast content in step S<b>540</b>, and transmits ‘the original language’ audio data separated from the received bilingual broadcast content to the mobile phone <b>200</b> in step S<b>550</b>. In this case, ‘the original language’ audio data transmitted to the mobile phone <b>200</b> from the DTV <b>100</b> is data which is not decoded after being separated from the broadcast content. Therefore, ‘the original language’ audio data transmitted in step S<b>550</b> is compressed audio data.

The mobile phone <b>200</b> receives ‘the original language’ audio data transmitted from the DTV <b>100</b> in step S<b>550</b>, decodes (decompresses) the received audio data, and outputs the decoded audio data in step S<b>560</b>.

The mobile phone <b>200</b> may output content which is irrelevant to the audio data output in step S<b>560</b> through a display while ‘the original language’ audio is being output in step S<b>560</b> in step S<b>570</b>.

Since operations in step S<b>570</b> can be inferred from operation in step S<b>370</b> of <figref idref="DRAWINGS">FIG. 1</figref>, detailed description regarding step S<b>570</b> will not be provided.

In this embodiment, ‘the original language’ audio is output from the mobile phone <b>200</b>, but this is only an example. ‘The native language’ audio, instead of ‘the original language’ audio, may be configured to be output from the mobile phone <b>200</b>.

In this case, a language to be output from the mobile phone <b>200</b> may be selected by a user. The GUI for selecting a language of audio to be output is illustrated in <figref idref="DRAWINGS">FIG. 7B</figref>.

Hereinafter, the process of remotely outputting multiple broadcast audio and caption data in a multiple audio remote output system which is consisted of the DTV <b>100</b> and the mobile phone <b>200</b> will be explained in detail with reference to <figref idref="DRAWINGS">FIG. 4</figref>.

<figref idref="DRAWINGS">FIG. 4</figref> is a diagram illustrating a method for remotely outputting multiple audio and caption according to another embodiment. Just like in <figref idref="DRAWINGS">FIGS. 1 to 3</figref>, the operations performed by the DTV <b>100</b> are illustrated in the left side and the operations performed by the mobile phone <b>200</b> are illustrated in the right side in <figref idref="DRAWINGS">FIG. 4</figref>.

As illustrated in <figref idref="DRAWINGS">FIG. 4</figref>, if a command to remotely output ‘an original language’ audio and caption data is input from a user in step S<b>620</b> while bilingual broadcast content is being received and output in step S<b>610</b>, the DTV <b>100</b> sets communication connection with the mobile phone <b>200</b> in step S<b>630</b>.

Subsequently, the DTV <b>100</b> outputs video and ‘a native language’ audio of the broadcast content in step S<b>640</b>.

In addition, the DTV <b>100</b> transmits ‘the original language’ audio data and ‘the original language’ caption data separated from the received bilingual broadcast content to the mobile phone <b>200</b> in step S<b>650</b>. In this case, ‘the original language’ audio data transmitted to the mobile phone <b>200</b> from the DTV <b>100</b> is data which is not decoded after being separated from the broadcast content. Therefore, ‘the original language’ audio data transmitted in step S<b>650</b> is compressed audio data.

The mobile phone <b>200</b> receives ‘the original language’ audio data transmitted from the DTV <b>100</b> in step S<b>650</b>, decodes (decompresses) the received audio data, and outputs the decoded audio data in step S<b>660</b>. In addition, the mobile phone <b>200</b> receives “the original language” caption data transmitted from the DTV <b>100</b> in step S<b>650</b> and outputs the received ‘the original language’ caption data through a display in step S<b>670</b>.

Thereafter, when a command to execute an electronic dictionary is input from a user in step S<b>680</b>, the mobile phone <b>200</b> executes electronic dictionary function in step S<b>690</b>. Accordingly, the user may look up the meaning of words in ‘the original language’ caption output through a display in step S<b>670</b> using the electronic dictionary provided in step S<b>690</b>.

In the embodiment, ‘the original language’ audio and caption is output from the mobile phone <b>200</b>, but this is only an example. ‘The native language’ audio and caption, instead of ‘the original language’ audio and caption, may be configured to be output from the mobile phone <b>200</b>.

<figref idref="DRAWINGS">FIG. 5</figref> is a block diagram of the DTV <b>100</b> according to an embodiment. As illustrated in <figref idref="DRAWINGS">FIG. 5</figref>, the DTV <b>100</b> comprises a broadcast receiving unit <b>110</b>, a broadcasting processing unit <b>120</b>, a broadcast output unit <b>130</b>, a controller <b>140</b>, a communication unit <b>150</b>, and a GUI generating unit <b>160</b>.

The broadcast receiving unit <b>110</b> selects and demodulates one of broadcasts which are received over a wired or wireless link via air or cable.

The broadcast processing unit <b>120</b> processes a broadcast signal output from the broadcast receiving unit <b>110</b>. The broadcast processing unit <b>120</b> comprises a broadcast separating unit <b>121</b>, a switching unit <b>122</b>, an audio decoding unit <b>123</b>, an audio processing unit <b>124</b>, a video decoding unit <b>125</b>, and a video processing unit <b>126</b>.

The broadcast separating unit <b>121</b> separates a broadcast signal output from the broadcast receiving unit <b>110</b> into an audio signal, a video signal and additional data.

The additional data separated from the broadcast signal is applied to the controller <b>140</b>, and the additional data may include Program and System Information Protocol (PSIP) information and caption data.

The switching unit <b>122</b> performs a switching operation so that the audio signal separated from the broadcast separating unit <b>121</b> may be transmitted to the audio decoding unit <b>123</b> and/or the communication unit <b>150</b>. In addition, the switching unit <b>122</b> performs a switching operation so that the video signal separated from the broadcast separating unit <b>121</b> may be transmitted to the video decoding unit <b>125</b> and/or the communication unit <b>150</b>. The switching operation of the switching unit <b>122</b> is controlled by the controller <b>140</b> which will be explained later.

The audio decoding unit <b>123</b> decodes the audio signal transmitted from the switching unit <b>122</b>. Accordingly, the audio decoding unit <b>123</b> outputs the decompressed audio signal.

The audio processing unit <b>124</b> converts the decoded audio signal output from the audio decoding unit <b>123</b> into an audio signal in the format which can be output through a speaker <b>131</b> formed in the DTV <b>100</b>.

The video decoding unit <b>125</b> decodes the video signal transmitted from the switching unit <b>122</b>. Accordingly, the video decoding unit <b>125</b> outputs the decompressed video signal.

The video processing unit <b>126</b> converts the decoded video signal output from the video decoding unit <b>125</b> into a video signal in the format which can be output through a display of the DTV <b>100</b>. To do so, the video processing unit <b>126</b> performs color signal processing, scaling, and so forth on the decoded video signal.

The GUI generating unit <b>160</b> generates a GUI to be displayed under the control of the controller <b>140</b>. In particular, the GUI generating unit <b>160</b> generates GUIs for inputting a command to remotely output audio, selecting multiple languages, and inputting apparatuses to remotely output audio, and generates a GUI where caption data is displayed.

The GUIs generated by the GUI generating unit <b>160</b> are applied to the video processing unit <b>126</b> and added to the videos to be displayed on a display.

The output unit <b>130</b> outputs video and audio corresponding to the video signal and the audio signal output from the broadcast processing unit <b>120</b> respectively and provides them to a user. The output unit <b>130</b> comprises the speaker <b>131</b> and the display <b>132</b>.

The speaker <b>131</b> outputs an audio signal transmitted from the audio processing unit <b>124</b>, and the display <b>132</b> outputs a video signal transmitted from the video processing unit <b>126</b>.

The communication unit <b>150</b> is communicably connected to an external apparatus such as the mobile phone <b>200</b> and an external network. In particular, the communication unit <b>150</b> transmits at least one of audio data and video data transmitted from the switching unit <b>122</b> to the mobile phone <b>200</b>. In addition, the communication unit <b>150</b> transmits information regarding a time when transmission of audio data starts to the mobile phone <b>200</b>, and receives information regarding a time when decoding of audio data is completed from the mobile phone <b>200</b>.

The controller <b>140</b> controls overall operation of the DTV <b>100</b> according to a user command. Specifically, the controller <b>140</b> controls the switching operation of the switching unit <b>122</b> according to a user command.

That is, if a command to remotely output audio is input from a user, the controller <b>140</b> controls the switching operation of the switching unit <b>122</b> so that an audio signal separated by the broadcast separating unit <b>122</b> is transmitted to the mobile phone <b>200</b> through the communication unit <b>150</b>.

Accordingly, the audio signal separated by the broadcast separating unit <b>121</b> is transmitted to an external apparatus, that is, the mobile phone <b>200</b>, and the speaker <b>131</b> of the output unit <b>130</b> stops outputting the audio signal according to the control of the controller <b>140</b>.

On the other hand, if a command to remotely output audio remotely is not input from a user, the controller <b>140</b> controls the switching operation of the switching unit <b>122</b> so that the audio signal separated by the broadcast separating unit <b>121</b> is transmitted to the audio decoding unit <b>125</b>. Accordingly, the speaker <b>131</b> of the output unit <b>130</b> may output the audio signal.

In addition, the controller <b>140</b> delays outputting the video of AV data considering information regarding a time when transmission of compressed audio data starts and information regarding a time when decoding is completed, the information received from the mobile phone <b>200</b>.

Furthermore, the controller <b>140</b> controls the GUI generating unit <b>160</b> to add caption data applied from the broadcast separating unit <b>121</b> to videos to be displayed through the display <b>132</b>. Alternatively, the controller <b>140</b> controls the communication unit <b>150</b> to transmit caption data to the mobile phone <b>200</b>.

Meanwhile, unlike what is illustrated in <figref idref="DRAWINGS">FIG. 5</figref>, the controller <b>140</b> may directly control the switching unit <b>122</b>, the audio decoding unit <b>123</b>, the audio processing unit <b>124</b>, the video decoding unit <b>125</b>, the audio processing unit <b>126</b>, the speaker <b>131</b>, and the display <b>132</b>.

<figref idref="DRAWINGS">FIG. 6</figref> is a detailed block diagram of the mobile phone <b>200</b> constituting an audio remote output system. As illustrated in <figref idref="DRAWINGS">FIG. 6</figref>, the mobile phone <b>200</b> comprises a mobile communication unit <b>210</b>, a touch screen <b>220</b>, a controller <b>230</b>, an audio output unit <b>240</b> and a network communication unit <b>250</b>.

The mobile communication unit <b>210</b> performs original function of the mobile phone <b>200</b> such as making a mobile phone call and performing SMS function.

The touch screen <b>220</b> serves both as a display means to display a screen necessary to perform functions of the mobile communication unit <b>210</b> or the network communication unit <b>250</b> and as an input means to receive a user command through touch.

The audio output unit <b>240</b> is used to output audio data and includes an output terminal for outputting audio data through a speaker and/or a connected headphone.

The network communication unit <b>250</b> is communicably connected to the DTV <b>100</b>, enabling data transmission between the DTV <b>100</b> and the mobile phone <b>200</b>.

The controller <b>230</b> controls the mobile communication unit <b>210</b>, the touch screen <b>220</b>, the audio output unit <b>240</b>, and the network communication unit <b>250</b> to perform operations of the mobile phone <b>200</b> from among operations illustrated in <figref idref="DRAWINGS">FIGS. 1 to 4</figref>.

To do so, the controller <b>230</b> controls to decode (decompress) compressed audio data received through the network communication unit <b>250</b> and output the decoded audio data through the audio output unit <b>240</b>. In addition, the controller <b>230</b> decodes (decompresses) video data received through the network communication unit <b>250</b> and outputs the decoded video data through the touch screen <b>220</b>.

The controller <b>230</b> controls to output caption data received through the network communication unit <b>250</b> through the touch screen <b>220</b>. In addition, the controller <b>230</b> may execute an electronic dictionary function and display the execution result on the touch screen <b>220</b>.

In addition, the controller <b>230</b> may control the network communication unit <b>250</b> to calculate a time when decoding of received audio data is completed considering a time when transmission of audio data transmitted from the DTV <b>100</b> starts, and transmit the calculated time of completion of decoding to the DTV <b>100</b>.

Since decoding of audio data and video data may require a considerable amount of work, a module for decoding audio data may be formed separately.

Meanwhile, the mobile phone <b>200</b> may further includes a storage unit (not shown) which stores an electronic dictionary program or various broadcast content.

In the above embodiments, a system for remotely outputting audio includes only one mobile phone <b>200</b>, but this is only an example. The technical feature of the present invention may be applied when there are a plurality of mobile phones <b>200</b>.

If there are a plurality of mobile phones <b>200</b>, it is required that one of the plurality of mobile phones is selected to set a communication connection in step S<b>330</b> of <figref idref="DRAWINGS">FIG. 1</figref>, step S<b>430</b> of <figref idref="DRAWINGS">FIG. 2</figref>, step S<b>530</b> of <figref idref="DRAWINGS">FIG. 3</figref> and step S<b>630</b> of <figref idref="DRAWINGS">FIG. 4</figref>.

In the above embodiments, a system for remotely outputting audio is consisted of the DTV <b>100</b> and the mobile phone <b>200</b>, but this is only an example. The technical feature of the present invention may be applied when the system for remotely outputting audio is consisted of other digital apparatuses.

That is, the DTV <b>100</b> may be a display apparatus which outputs audio to an external apparatus remotely, and the mobile phone <b>200</b> may be various types of apparatus which outputs audio. Therefore, the DTV <b>100</b> and the mobile phone <b>200</b> may be replaced with other digital apparatuses.

For example, the mobile phone <b>200</b> may be replaced with a headset. In this case, the headset may include an earphone for communicating with the DTV <b>100</b> or may have a Bluetooth® function.

The system for remotely outputting audio may be configured to further include a headset which is connected to the mobile phone <b>200</b> via wire or wirelessly, in addition to the DTV <b>100</b> and the mobile phone <b>200</b>. In this case, the above-described operations of the mobile phone <b>200</b> may be performed by the headset.

Likewise, it is required that a digital apparatus for remotely outputting audio is selected to set communication connection in step S<b>330</b> of <figref idref="DRAWINGS">FIG. 1</figref>, step S<b>430</b> of <figref idref="DRAWINGS">FIG. 2</figref>, step S<b>530</b> of <figref idref="DRAWINGS">FIG. 3</figref> and step S<b>630</b> of <figref idref="DRAWINGS">FIG. 4</figref>. <figref idref="DRAWINGS">FIG. 7A</figref> illustrates an example of a GUI for selecting an apparatus for remotely outputting audio, and <figref idref="DRAWINGS">FIG. 7B</figref> illustrates an example of a GUI for selecting an apparatus for outputting multiple audio remotely.

When the DTV <b>100</b> transmits audio data and caption data to the mobile phone <b>200</b>, it is possible to trans-code the audio data and the caption data to a format supported by the mobile phone <b>200</b> and transmit the trans-coded data.

To do so, the DTV <b>100</b> may identify the format of audio data which can be supported by the mobile phone <b>200</b> (that is, the format which can be decoded) and perform trans-coding before transmitting the audio data.

When audio is remotely output from the mobile phone <b>200</b>, the DTV <b>100</b> may delay outputting video to compensate non-synchronization between the video output from the DTV <b>100</b> and the audio output from the mobile phone <b>200</b> due to the time required for transmitting the audio data to the mobile phone <b>200</b> and the time required for decoding and outputting the audio data in the mobile phone <b>200</b>.

Specifically, the network communication unit <b>250</b> of the mobile phone <b>200</b> receives information regarding a time when transmission of compressed audio data starts from the DTV <b>100</b>. Subsequently, the controller <b>230</b> of the mobile phone <b>200</b> calculates a time of completion of decoding considering the time when transmission of the audio data starts, and the network communication unit <b>250</b> of the mobile phone <b>200</b> may transmit the calculated time of completion of decoding to an external apparatus, that is, the DTV <b>100</b>.

As a result, the DTV <b>100</b> may delay outputting video using information regarding the time when transmission of compressed audio data starts and the time when decoding is completed. Accordingly, even if audio is remotely output from the mobile phone <b>200</b>, the video output from the DTV <b>100</b> may be synchronized with the audio output from the mobile phone <b>200</b> may be synchronized.

The time of delaying outputting video may be manually set by a user or may be automatically calculated by the DTV <b>100</b>.

The language of audio data to be output remotely from the mobile phone <b>200</b> may be selected by a user using a GUI provided by the DTV <b>100</b> or the mobile phone <b>200</b>.

If the language is selected by the DTV <b>100</b>, the DTV <b>100</b> transmits audio data in a language selected by a user to the mobile phone <b>200</b>. However, if the language is selected by the mobile phone <b>200</b>, the mobile phone <b>200</b> requests the DTV <b>100</b> for audio data in a language selected by a user, and the DTV <b>100</b> transmits the audio data in the language requested by the mobile phone <b>200</b> to the mobile phone <b>200</b>.

While the present invention has been shown and described with reference to certain embodiments thereof, it will be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.